JPS63256855A - Image monitoring device for fishes - Google Patents

Abstract

PURPOSE:To effectively recognize fishes in an image by providing partition plate for straightening and diving weir plate in a water tank. CONSTITUTION:Water is fed to and discharged from the transparent water tank 10 and fishes 18 are kept in the space between partitions 11A and 11B made of wire netting and porous plates. The diving weir plate 12 is provided on the downstream side of the partition plate 11B. The water and fishes are picked up by an ITV 30 with light obtained from a lighting device 16 through a translucent plate 17. A signal is led to an image processor 40 to recognize the fish image, and the behavior of the fishes is evaluated, so that a warning is generated by a warning device 50 when the fishes behave abnormally. Consequently, the feed water which flows in the water tank flows without drifting in the water tank and if the fishes come to the water surface owing to a factor other than abnormal water quality, this case is deleted from the abnormal behavior decision, thereby accurately detecting the action of the fishes.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is capable of image recognition of organisms reared using inflow water and treated water of water purification plants, sewage treatment plants, river water, etc. as test water. The present invention also relates to an image processing method of breeding tanks, their structures, and normal and abnormal behavior in a device for detecting the presence or absence of toxic substances in test water.

[Conventional technology]

At water treatment plants, in order to determine whether or not toxins have been mixed into the raw water, a portion of the raw water or purified water is introduced into an aquarium where fish such as crucian carp, carp, dace, tanago, oysterfish, and goldfish are raised. ing. Similarly.

Fish are sometimes kept in order to monitor the presence of toxic substances in treated water from sewage treatment plants, discharged water, river water, and lakes. If poisonous substances enter the water, fish may behave abnormally or die, so this is visually monitored. However, since it relies on visual inspection and cannot be detected unless a person is monitoring it, automatic monitoring has been desired.

A method of monitoring fish is to detect fish in an aquarium from the top of the tank using an industrial television camera and process the image (Reference: No. 36).
A collection of lectures from the National Waterworks Research Presentation Conference, pages 464-466) has been devised. However, this method only issues an alarm through image monitoring when a fish rises to the surface of the water, and does not provide details on the structure of the aquarium or how to determine abnormal fish behavior.

[Problem that the invention seeks to solve]

The inventors have conducted repeated research to put into practical use a method for monitoring the behavior of fish using images, and have now invented an aquarium structure that can effectively recognize fish by image, and a method for accurately processing images.

The conventional technology detects fish in a breeding aquarium using an industrial camera and processes the image, but does not describe the details of the aquarium structure. Also, regarding the results of image processing, if a fish rises below the water surface, it will be determined as abnormal and an alarm will be issued.
There is also no description of how to determine what kind of change caused the fish to surface.

The purpose of the present invention is to provide an appropriate aquarium structure that allows fish to react quickly when harmful substances are mixed into the raw water flowing into the aquarium, and when the fish surface below the water surface, their behavior will be It is an object of the present invention to provide an image monitoring device that temporarily stops image capture or image processing when it is obvious that the problem has occurred when the water quality is normal, such as during feeding.

[Means for solving problems]

In the present invention, when image-monitoring the behavior of fish, the tank structure is such that the raw water flowing into the tank flows without causing drift within the tank, and if fish rise to the water surface due to factors other than abnormal water quality, For this purpose, we have performed a process to remove abnormal behavior from the determination process, making it possible to accurately detect the results of fish behavior.

[Effect]

In the present invention, the flow of raw water is rectified by installing a perforated rectifying plate and a submerged weir plate in the aquarium, and when the water quality is normal, fish that can be determined to have surfaced are excluded from image processing, and fish It is possible to improve the accuracy of water quality abnormality detection in behavioral monitoring.

〔Example〕

Examples will be described below with reference to the drawings.

The configuration of the embodiment will be explained using FIG. 10 is a water tank to which water is supplied by a water supply pipe 13 and a water supply pump 14.

The water tank 10 has a rectangular shape, and the material of the side surfaces is a transparent substance such as glass or transparent acrylic. The water introduced into the water tank 10 is drained through a drain pipe 15. In the aquarium 10, fish 18 are reared in a rearing space partitioned by partition plates 11A and IIB such as wire mesh or perforated plates. Here, the partition plates 11A and IIB allow water to pass through, but do not allow the fish 18 to pass through. Further, the weir plate 12 is installed on the downstream side of the partition plate 11B. The lighting device 16 illuminates the fish 18 in the aquarium 10. A semitransparent plate 17 made of a semitransparent substance such as ground glass or paper is provided between the lighting device 16 and the aquarium 10. An industrial television camera (
An imaging device 30 such as ITV) is arranged. That is, the imaging device 30 images the light obtained from the illumination device 16 through the semi-transparent plate 17. Here, the imaging device 30 has a partition plate 11A.
The water and fish between and '11B are imaged. Imaging device 3
The signal of 0 is guided to the image processing device 40 to image-recognize the fish. The alarm device 50 evaluates the behavior of the fish from the image of the fish obtained by the image processing device 40, and issues an alarm in case of abnormality. The monitor television 60 displays captured images, image recognition results, and evaluation results of the moving speed of the fish.

Next, the details of the configuration and operation of this embodiment will be explained below.

The water supply pump 14 samples the water to be tested and supplies it to the water supply pipe 13.
is supplied to the aquarium 10 by. Test water is rivers, swamps, water within the water treatment plant, etc. (not shown) in water treatment plants, inflow sewage or treated water in sewage treatment plants, and river water in the case of monitoring toxic substances in rivers. . Water in the water tank 10 is drained through a drain pipe 15. In the aquarium 10, partition plates 11A and 11B such as wire mesh or perforated plates are installed to allow water to pass through but not fish, and a weir plate 12 is installed on the downstream side of the partition plate 11B.

Next, using FIG. 2 and FIG. 3, one of the present invention,
The configuration and operation of the partition plates 11A, IIB and the weir plate 12 will be described in detail. FIG. 2 shows partition plates 11A and 11B, in which the partition plates have porous holes 19. Further, the flow of the water to be tested is indicated by 20A and 20B. Water tank 10
The partition plates 11A and 11B installed inside have the role of maintaining a space for breeding fish and at the same time rectifying the flow of the water to be tested. In other words, if a harmful substance is mixed into the test water, the fish being kept will react quickly and any abnormal behavior must be monitored. However, if there is no partition plate or its structure is inadequate, the flow of the test water in the aquarium 10 will be uneven, and even if the fish do not show any reaction, the test water containing harmful substances will be sent to the water treatment plant. Then it will be used as raw water.

Therefore, the partition plate here is used as a porous rectifier plate, and the water 4!1
The structure is such that the test water that enters the water tank flows uniformly without causing drift and passing through only a part of the water tank flow path.

FIG. 3 shows the dam plate 12. The speakeasy weir plate 12 is installed so that the top and side surfaces of the water tank 10 are partitioned, and a part of the bottom becomes a space.6 Therefore, the flow of the water to be tested is as shown in 2OA and 20B. It comes to pass between the water tanks 10.

The installation of the weir plate 12 assists the role of the porous partition plate in rectifying the flow, and maintains the flow of the water to be tested between the partition plates 11A and IIB in a state close to an extrusion flow.

By installing the porous partition plates 11A and IIB and the dam plate 12, if a harmful substance is mixed in the test water, the fish 18 kept in the aquarium 10 will react quickly, and this can be imaged.

In addition, as an example, the structure of the partition plate was a perforated plate, but
This is not particularly limited, and any structure that can rectify the flow of the water to be tested may be used.

Next, the lighting device 16. Translucent plate 17. The configurations of the water tank 10 and the imaging device 3o will be explained. The illumination device 16 and the imaging device 30 are arranged in opposite directions with the water tank 10 in between. A semitransparent plate 17 made of a semitransparent substance such as ground glass or paper is provided between the lighting device 16 and the aquarium 1o. The light emitted from the entire semi-transparent plate 17 illuminates the aquarium 10.
The passing light is detected by the imaging device 30. Therefore, light passes through the water area and is detected with bright brightness, while the fish 1
8 does not transmit light, so it is detected with low brightness. That is, the fish 18 can be recognized as a dark part.

Next, an imaging method will be explained. An imaging device 30 such as an industrial television camera sequentially scans the image of the area between the partition plates 11A and IIB in the horizontal direction and then in the vertical direction, and adjusts the brightness of each point according to its degree. Sequentially converted into electrical signals.

In other words, the image of the area is finely divided vertically and horizontally.

The brightness of each divided pixel is converted into electrical signals with different output voltages depending on the brightness level. The electrical signal output from the imaging device 30 is an analog signal such as voltage. Imaging device 3
The electrical signal output from o is transmitted to the image processing device 40.

The image processing device 40 recognizes the fish 18 based on the image of the area obtained by the imaging device 30, and also determines the swimming speed of the fish 18 based on this recognition result.
Alternatively, it is detected where in the aquarium 10 they are distributed. The alarm device 50 detects the fish 1 obtained by the image processing device 40.
Evaluate the behavior of 8 and issue a warning if there is an abnormality. Furthermore, the monitor television 60 displays captured images, image recognition results, and evaluation results of the fish's movement speed and position distribution.

As a result of conducting various experiments using the fish image monitoring apparatus described above, a zero image monitoring method, which is another one of the present invention, was discovered. Next, the details will be explained. As a result of experiments using the image monitoring device shown in Figure 1 on crucian carp, carp, dace, and tanago, it was found that when the water quality is normal, all of the above fish are located near the bottom of the tank and swimming slowly. was monitored. On the other hand, when the water quality was abnormal, each young fish was monitored as actively swimming around in the tank, and the difference in behavior from normal water quality behavior was clearly shown through image recognition processing. However, as a result of continuous image monitoring for several days, it was found that even when the water quality is normal, they behave in the same way as when the water quality is abnormal. This happened when the aquarium was given a big shock, when something was put into the aquarium, and even when feeding. Although it was possible to take measures against shocking the tank or putting objects in it, it was impossible to stop feeding the tank.

As a result of monitoring the behavior of the fish during feeding, it was found that although it varied depending on the placement of the bait, the period during which the fish were actively swimming on the surface of the water and eating food, which was considered abnormal, was not very long.

Therefore, by temporarily stopping image capture during feeding, the malfunction of image monitoring could be canceled. The operation method for temporarily stopping image monitoring is to set the feeding time on - days, stop the image capture operation from the feeding time, and set the timer to start the operation after a certain fixed time.

It goes without saying that once the feeding time is set, operations for stopping and starting image capturing can be performed automatically.

〔Effect of the invention〕

According to the present invention, it is possible to understand the behavior of fish in response to changes in water quality, and the accuracy of detecting abnormalities in water quality by image monitoring is improved.

[Brief explanation of drawings]

FIG. 1 is a diagram illustrating details of the present invention, FIG. 2 is a diagram illustrating details of a partition plate, and FIG. 3 is a diagram illustrating details of a weir plate. Bundle 1 diagram

Claims (1)

[Scope of Claims] 1. An aquarium through which test water flows, fish kept in the aquarium, an imaging device that converts image information of the fish into electrical signals, and a lighting device for imaging the fish. , a fish image monitoring device equipped with an image processing device that recognizes the fish from image information obtained from the imaging device, wherein a partition plate and a diversion weir plate are provided in the aquarium to rectify the test water. An image monitoring device for fish, characterized in that: 2. The image monitoring device for fish according to claim 1, characterized in that the image capturing operation or image processing can be temporarily stopped.